CN111608435A - Subway station and viaduct combined construction structure and construction method thereof - Google Patents
Subway station and viaduct combined construction structure and construction method thereof Download PDFInfo
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- CN111608435A CN111608435A CN202010401983.5A CN202010401983A CN111608435A CN 111608435 A CN111608435 A CN 111608435A CN 202010401983 A CN202010401983 A CN 202010401983A CN 111608435 A CN111608435 A CN 111608435A
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- 238000010276 construction Methods 0.000 title claims abstract description 162
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 171
- 239000010959 steel Substances 0.000 claims abstract description 171
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 210000001503 joint Anatomy 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 6
- 238000009415 formwork Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 5
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
Abstract
A combined construction pile is installed at the bottom of a combined construction bearing platform, the combined construction bearing platform is installed in a station bottom plate, concrete is poured in a combined construction steel pipe column, the combined construction steel pipe column penetrates through and is connected to a station middle plate and a station top plate, the bottom end of the combined construction steel pipe column is installed on the combined construction bearing platform, and the top end of the combined construction steel pipe column penetrates out of the station top plate to serve as a bridge pier connector used for being connected with a bridge pier. The construction steps comprise the construction of a combined construction pile, the excavation of a station foundation pit, the concrete pouring of a station bottom plate and a combined construction bearing platform, the hoisting and installation of a lower combined construction steel pipe column, the concrete pouring of a negative second-layer side wall and a station middle plate, the hoisting and installation of an upper combined construction steel pipe column and the concrete pouring of a negative first-layer side wall and a station top plate. The method solves the problems of high comprehensive cost and difficult design and construction of parallel planning of the subway station and the viaduct of the urban main road under the condition of lacking of land resources, and effectively ensures the construction quality and safety of the co-construction project.
Description
Technical Field
The invention relates to the technical field of municipal engineering, in particular to a combined construction structure of a subway station and an overhead bridge and a construction method thereof.
Background
With the rapid development of urban construction, a plurality of ground spaces in the central area of a developed area city are utilized and saturated, and in recent years, the underground spaces of the city are developed and utilized gradually and greatly, particularly urban rail transit engineering, comprehensive pipe gallery engineering and the like, so that the selectivity of urban planned traffic routes is limited or a joint construction project is designed and constructed in a crossed manner, and more design and construction problems of the joint construction project appear.
Due to urban space limitation, a subway station and a viaduct are generally planned in parallel, a first bridge is arranged at a later station, the station is constructed by a cover excavation method, viaduct piers are located on a top plate of the subway through orthogonal pier transfer beams, the piers are not connected with inner columns of the station, different construction companies are responsible for implementation, implementation time is required to be different, if synchronous design and construction are not considered, great technical problems can be brought to subsequent design and construction projects, construction period is prolonged, even implementation cannot be achieved, and line re-change and construction investment are caused to be larger.
Therefore, the necessity of new exploration research on the combined construction design of the subway station and the viaduct is needed, the design and construction problems of the combined construction engineering of the underground subway station and the viaduct of the urban rail transit are solved, the local land limitation is better solved, the land resource is saved, the rationalization of the urban traffic function is enhanced, the investment of the construction engineering is reduced, the integrated level of the design and construction is improved, the construction difficulty is reduced, the construction period is shortened, and the construction quality and the safety factor are improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a subway station and viaduct combined construction structure and a construction method thereof, which solve the problems of high comprehensive cost and difficult design and construction due to parallel planning of the subway station and the viaduct of the urban main road under the condition of lacking of existing land resources, effectively ensure the construction quality and safety of combined construction projects, optimize a traffic integrated design scheme and better serve people.
In order to achieve the purpose, the invention adopts the technical scheme that:
the subway station and viaduct combined building structure comprises a station structure and a combined building supporting structure, wherein the station structure comprises a station bottom plate, negative two-layer side walls, a station middle plate, negative one-layer side walls and a station top plate, the negative two-layer side walls are respectively installed on the left side and the right side of the station bottom plate, the station middle plate is installed above the station bottom plate through the negative two-layer side walls on the left side and the right side, the negative one-layer side walls are respectively installed on the left side and the right side of the station middle plate, and the station top plate is installed above the station middle plate through the negative one-layer side walls on the left; the combined construction supporting structure comprises a combined construction pile, a combined construction bearing platform and a combined construction steel pipe column, the combined construction pile is installed at the bottom of the combined construction bearing platform, the combined construction bearing platform is installed in a station bottom plate, concrete is poured in the combined construction steel pipe column, the combined construction steel pipe column penetrates through and is connected to a station middle plate and a station top plate, the bottom end of the combined construction steel pipe column is installed on the combined construction bearing platform, and the top end of the combined construction steel pipe column penetrates out of the station top plate to serve as a bridge pier interface for being connected with a bridge pier.
As a further improvement of the invention, the combined construction supporting structure is provided with one group or two groups, and in each group of combined construction supporting structure, one or two combined construction piles are provided; when the combined building support structures are in one group, the combined building support structures are arranged in the middle of the station structure; when the combined support structures are two groups, the two groups of combined support structures are respectively arranged on the left side and the right side of the middle part of the station structure.
As a further improvement of the invention, the joint-building steel pipe column is provided with a permanent anticorrosive layer and a fireproof layer; the joint-building steel pipe column is formed by connecting two sections, and the connecting point of the two sections of joint-building steel pipe columns is positioned at least 1m above the middle plate of the station; the diameter of the co-constructed steel pipe column is at least 1.5m, the wall thickness is at least 30mm, and concrete C60 is poured in the column; the column base of the co-constructed steel pipe column adopts an end-bearing column base; the joint of the co-constructed steel pipe column and the middle plate beam in the station is connected by adopting shear nails and bracket ring beams; and the joint of the co-constructed steel pipe column and the station roof beam is connected by a bracket ring beam.
As a further improvement of the invention, the combined construction pile adopts a cast-in-situ bored pile with the diameter of at least 1.8m and the length of at least 15 m; the combined construction pile is embedded into a continuous and complete micro weathering layer, and the depth of the embedded micro weathering layer is not less than 1 m.
As a further improvement of the invention, the combined building platform is positioned in the station bottom plate, the bottom surface of the combined building platform is lower than the bottom surface of the station bottom plate, and the top surface of the combined building platform is flush with the top surface of the station bottom plate.
As a further improvement of the invention, the joint section of the pier, which is positioned above the top plate of the station, of the joint construction steel pipe column is provided with brick laying protection and cement mortar wrapping protection.
The invention also provides a construction method of the subway station and viaduct combined construction structure, which comprises the following steps:
step 1), co-construction pile construction: constructing piles with combined pile hole forming more than 50m by using a punching drilling machine, and constructing piles within 50m by using a rotary drilling machine; the length of the combined construction pile is more than 25m, and the combined construction pile is divided into two sections to be welded and connected for assembling and lowering the cage;
step 2) excavating a station foundation pit: according to geological conditions, a long arm excavator and a short arm excavator are matched to directly excavate, and if a rock stratum with high hardness is encountered, a hook excavator is used for breaking and then excavating and transporting;
step 3), concrete pouring of the station bottom plate and the combined building bearing platform: binding reinforcing steel bars on the station bottom plate and the co-building bearing platform, after binding, installing an axillary corner template of the station bottom plate by adopting a steel template, embedding a co-building steel pipe column and a co-building bearing platform node reinforcement cage, an anchor bolt and a positioning pre-embedded cushion steel plate, and then pouring the station bottom plate and the co-building bearing platform concrete;
step 4), hoisting and installing a lower joint building steel pipe column: hoisting is carried out by utilizing a lifting lug at the upper end of the lower joint-building steel pipe column, after the hoisting is in place, the center lines of four sides of the column are aligned and matched with the center line of the foundation paying-off line, and the alignment of the center lines or the deviation control within the range allowed by the specification is taken into consideration, so that the in-place work of the lower joint-building steel pipe column is completed; after the hoisting is finished, performing secondary grouting on the column base in time;
step 5), pouring negative second-layer side wall and station middle plate concrete: the fastener type steel pipe full-space support frame formwork is adopted for pouring the negative second-layer side wall and the station middle plate concrete at one time, so that the number of longitudinal construction joints is reduced, water seepage points of the structure are reduced, and the construction progress is accelerated; after the construction of the negative second-layer side wall of the station and the middle plate of the station is finished, the concrete of the lower joint-building steel pipe column is poured in time, and a concrete construction joint in the column is arranged at a position 500-600 mm below the port of the joint-building steel pipe column;
step 6), hoisting and installing the upper joint building steel pipe column: before hoisting, cleaning the butt joint surfaces of the upper joint-building steel pipe column and the lower joint-building steel pipe column, and ensuring that the butt joint surfaces of the upper joint-building steel pipe column and the lower joint-building steel pipe column are in contact and tightly propped; during hoisting, hoisting is carried out by utilizing the lifting lugs at the upper end of the upper joint building steel pipe column; after the upper joint-building steel pipe column is hoisted in place, the central line of the upper joint-building steel pipe column is matched with the central line of the lower joint-building steel pipe column, and then the upper joint-building steel pipe column and the lower joint-building steel pipe column are connected together through bolts and welding;
step 7), pouring negative layer side wall and station roof concrete: the fastener type steel pipe full-space support frame formwork is adopted for pouring the negative layer of side wall and station top plate concrete at one time, the number of longitudinal construction joints is reduced, the structural water leakage points are reduced, and the construction progress is accelerated; after the construction of the negative layer side wall and the station top plate of the station is finished, the concrete of the upper joint-built steel pipe column is poured in time, the concrete construction joint in the column is arranged at the position 500 mm-600 mm below the joint of the joint-built steel pipe column, and the pier joint section of the joint-built steel pipe column above the station top plate is subjected to brick laying protection and cement mortar wrapping protection.
As a further improvement of the invention, in the step 2), in the excavation process, the relationship between excavation and support is well processed according to the principles of vertical layering, longitudinal partition and segmentation, transverse middle first and two sides second, support first and excavation second and rapid bottom sealing, so that the deformation of the foundation pit is ensured to be always controlled within the qualified index.
As a further improvement of the invention, in both or either of the step 4) and the step 6), during hoisting, the root of the co-constructed steel pipe column needs to be padded, the root is not lifted off the ground, the co-constructed steel pipe column is gradually straightened through lifting of the lifting hook, amplitude variation and rotation of the lifting arm, the co-constructed steel pipe column is lifted continuously after the co-constructed steel pipe column basically stops shaking, the co-constructed steel pipe column is lifted in place, the co-constructed steel pipe column is not allowed to be lifted up directly by the lifting hook in an inclined manner, after the co-constructed steel pipe column is lifted in place, perpendicularity correction is carried out, two theodolites are used for simultaneously observing the two longitudinal and transverse axes of the co-constructed steel pipe column, adjustment is carried out by means of a jack, the column base is fixed.
As a further improvement of the invention, the co-constructed steel pipe column is processed and manufactured outside a professional steel structure factory and is transported to a construction site after permanent anti-corrosion treatment, and the construction of the co-constructed steel pipe column fire-proof layer is carried out after the main structure of the station is finished.
The invention has the beneficial effects that: in the invention, the subway station and the viaduct share the co-construction supporting structure, so that the occupied land resource is small, the problem of local urban land limitation is solved, the land resource is saved, the rationalization of urban traffic function is enhanced, the investment of construction engineering is reduced, the integration degree is high, the construction efficiency is high, the coordination difficulty and interference during construction are low, and the construction quality and safety are ensured.
Drawings
FIG. 1 is a schematic structural view of an embodiment;
FIG. 2 is a schematic structural diagram according to a second embodiment;
description of the labeling: 1-station structure, 11-station bottom plate, 12-negative second-layer side wall, 13-station middle plate, 14-negative first-layer side wall, 15-station top plate, 2-co-building supporting structure, 21-co-building pile, 22-co-building bearing platform, 23-co-building steel pipe column, 231-upper-section co-building steel pipe column, 232-lower-section co-building steel pipe column, 233-pier interface, 3-viaduct and 31-pier.
Detailed Description
The invention is further described with reference to the following specific embodiments and the accompanying drawings.
The first embodiment is as follows:
the construction method of the structure is adopted in the implementation of the project of jointly building a certain track traffic and an overhead bridge of the main road of the city in Guangzhou.
A certain subway station is a double-column three-span (single-column double-span in a public area) 2-layer station (two underground layers), the width of a standard section foundation pit is 40.88m, the depth of the standard section foundation pit is about 19.4m, and the total length of a foundation pit is 647.6 m; a main road of a certain city is continuous, the total length of the road is about 9.5km, the width of a red line is 60-70 m, a main line bidirectional 6-lane bridge spans a certain existing high speed, an auxiliary road bypasses from the bottom of a certain high speed bridge, the main road and the auxiliary road are planned in parallel with a subway station of a certain subway line, the direction of the main road and the auxiliary road is basically consistent, and the parallel length is about 732 m.
The lower part structure of the viaduct at the parallel section of a certain subway station and a certain urban main road is jointly built, the viaduct pier is transmitted to the bottom joint-built pile through the subway station pillar, and the structure is as follows:
as shown in fig. 1, a subway station and viaduct combined building structure comprises a station structure 1 and a combined building support structure 2, wherein the station structure 1 comprises a station bottom plate 11, a negative two-layer side wall 12, a station middle plate 13, a negative one-layer side wall 14 and a station top plate 15, the negative two-layer side wall 12 is respectively installed on the left side and the right side of the station bottom plate 11, the station middle plate 13 is installed above the station bottom plate 11 through the negative two-layer side walls 12 on the left side and the right side, the negative one-layer side wall 14 is respectively installed on the left side and the right side of the station middle plate 13, and the station top plate is installed above the station middle plate 13 through; the co-constructed supporting structure 2 comprises a co-constructed pile 21, a co-constructed bearing platform 22 and a co-constructed steel pipe column 23, the co-constructed pile 21 is installed at the bottom of the co-constructed bearing platform 22, the co-constructed bearing platform 22 is installed in the station bottom plate 11, concrete is poured in the co-constructed steel pipe column 23, the co-constructed steel pipe column 23 penetrates through and is connected with the station middle plate 13 and a station top plate, the bottom end of the co-constructed steel pipe column 23 is installed on the co-constructed bearing platform 22, the top end of the co-constructed steel pipe column 23 penetrates out of the station top plate to serve as a bridge pier interface 233 used for being connected with the bridge pier 31, and the bridge pier 31 of the viaduct 3 is connected with the bridge pier.
The combined building supporting structure 2 is provided with a group and arranged in the middle of the station structure 1, and one combined building pile 21 is arranged in each group of combined building supporting structure 2.
The joint-building steel pipe column 23 is cylindrical, and the joint-building steel pipe column 23 is provided with a permanent anticorrosive layer and a fireproof layer. The joint-building steel pipe column 23 is formed by connecting an upper joint-building steel pipe column 231 and a lower joint-building steel pipe column 232, and the connection point of the upper joint-building steel pipe column 231 and the lower joint-building steel pipe column 232 is located 1m above the station middle plate 13. The diameter of the co-constructed steel pipe column 23 is 1.5m, the wall thickness is 30mm, and concrete C60 is poured in the column. And the column base of the co-building steel pipe column 23 adopts an end bearing type column base. The joint-built steel pipe column 23 is connected with the beam node of the station middle plate 13 by adopting shear nails and bracket ring beams. And the joint of the co-constructed steel pipe column 23 and the station roof beam is connected by a bracket ring beam.
The combined construction pile 21 adopts a cast-in-situ bored pile with the diameter of 1.8m, the length of the cast-in-situ bored pile is 15-51.5 m, and the hole forming depth is 34-72.5 m; the co-construction pile 21 is embedded into a continuous and complete slightly weathered layer, and the depth of the embedded slightly weathered layer is not less than 1 m.
The combined building platform 22 is located in the station bottom plate 11, the bottom surface of the combined building platform 22 is lower than the bottom surface of the station bottom plate 11, and the top surface of the combined building platform 22 is flush with the top surface of the station bottom plate 11.
The joint section of the pier 31 of the joint construction steel pipe column 23 above the station roof is provided with brick laying protection and cement mortar wrapping protection.
The subway station and viaduct combined construction structure is constructed by adopting the following steps:
the co-constructed steel pipe column 23 is processed and manufactured outside a professional steel structure factory and is transported to a construction site after permanent anti-corrosion treatment, and construction of the fire-proof layer of the co-constructed steel pipe column 23 is performed after the main structure of the station is completed. And (3) hoisting the combined construction steel pipe column 23 into upper and lower combined construction steel pipe columns 232 and 232 by using an automobile crane according to the construction process of the main structure of the station and the type selection of hoisting equipment.
Step 1), co-building pile 21 construction: constructing the combined construction pile 21 with the pile with the hole more than 50m by using a punching drilling machine, and constructing within 50m by using a rotary drilling machine; the length of the combined construction pile 21 is more than 25m, and the combined construction pile is assembled and laid in a cage by being divided into two sections for welding connection;
step 2) excavating a station foundation pit: according to geological conditions, a long arm excavator and a short arm excavator are matched to directly excavate, and if a rock stratum with high hardness is encountered, a hook excavator is used for breaking and then excavating and transporting; in the excavation process, the relationship between excavation and support is well processed according to the principles of vertical layering, longitudinal partition and segmentation, transverse middle first and two sides second, support first and excavation second and quick bottom sealing, and the deformation of the foundation pit is ensured to be controlled within a qualified index all the time;
step 3), pouring concrete on the station bottom plate 11 and the combined building bearing platform 22: binding reinforcing steel bars on the station bottom plate 11 and the co-construction bearing platform 22, installing an axillary corner template of the station bottom plate 11 by adopting a steel template after binding is finished, embedding a co-construction steel pipe column 23, a co-construction bearing platform 22 node reinforcing cage, an anchor bolt and a positioning pre-embedded cushion steel plate, and then pouring concrete on the station bottom plate 11 and the co-construction bearing platform 22;
step 4), hoisting and installing a lower joint-built steel pipe column 232: lifting is carried out by using a lifting lug at the upper end of the lower joint-building steel pipe column 232, when the lower joint-building steel pipe column 232 is lifted, the root of the lower joint-building steel pipe column 232 needs to be padded up tightly, the root is not lifted off the ground, the lower joint-building steel pipe column 232 is lifted, amplitude and suspension arm rotation are carried out through a lifting hook, the lower joint-building steel pipe column 232 is straightened step by step, the lower joint-building steel pipe column 232 is lifted continuously after basically stopping shaking, the lower joint-building steel pipe column 232 is lifted in place, and the lifting hook is not allowed to be inclined to directly lift the; after the lower section of the steel pipe column 232 is hoisted in place, the central lines of the four sides of the lower section of the steel pipe column 232 are aligned and matched with the central line of the foundation paying-off line, the four sides are considered, the central lines are aligned or the deviation is controlled within the range allowed by the standard, namely, the lower section of the steel pipe column 232 is completed in place, in addition, the verticality correction is carried out, two theodolites are used for simultaneously observing the two longitudinal and transverse axes of the lower section of the steel pipe column 232, the adjustment is carried out by a jack, the column foot is fixed after the fault is avoided, and a wind rope is; after the hoisting is finished, performing secondary grouting on the column base in time;
step 5), pouring concrete of the negative second-layer side wall 12 and the station middle plate 13: the negative second-layer side wall 12 and the station middle plate 13 concrete are poured at one time by adopting a fastener type steel pipe full-hall support frame formwork, so that the number of longitudinal construction joints is reduced, the water seepage points of the structure are reduced, and the construction progress is accelerated; after the construction of the negative second-layer side wall 12 and the middle plate 13 of the station is finished, the concrete of the lower joint building steel pipe column 232 is poured in time, and a concrete construction joint in the column is arranged at a position 500-600 mm below the 232 port of the lower joint building steel pipe column;
step 6), hoisting and installing the upper joint building steel pipe column 231: before hoisting, cleaning the butt joint surfaces of the upper joint-building steel pipe column 231 and the lower joint-building steel pipe column 232, and ensuring that the butt joint surfaces of the upper joint-building steel pipe column 231 and the lower joint-building steel pipe column 232 are tightly contacted and jacked; during hoisting, the upper part of the upper joint building steel pipe column 231 is provided with a temporary connecting lug plate, and the temporary connecting lug plate is used as a hoisting point of the upper joint building steel pipe column 231 for hoisting; after the upper joint close-built steel pipe column 231 is hoisted in place, the central line of the upper joint close-built steel pipe column 231 is matched with the central line of the lower joint close-built steel pipe column 232, and the four sides are considered, the movable double clamping plates are stably inserted into the mounting lug plates corresponding to the lower joint close-built steel pipe column 232, the connecting bolts are threaded, the temporary connecting clamping plates are connected, the bolts are screwed in time for stabilization, and after the bolt connection of the upper joint close-built steel pipe column 231 and the lower joint close-built steel pipe column 232 is completed, the welding seams are welded;
step 7), pouring concrete of the negative layer side wall 14 and the station top plate 15: the fastener type steel pipe full-space support frame formwork is adopted for pouring concrete of the negative layer side wall 14 and the station top plate 15 at one time, the number of longitudinal construction joints is reduced, water seepage points of the structure are reduced, and the construction progress is accelerated; after the construction of the negative layer side wall 14 and the station top plate 15 of the station is finished, the concrete of the upper joint-building steel pipe column 231 is poured in time, a concrete construction joint in the column is arranged at a position 500 mm-600 mm below the 231 port of the upper joint-building steel pipe column, and the pier interface section of the joint-building steel pipe column 23 above the station top plate 15 is subjected to brick laying protection and cement mortar wrapping protection.
The structure and the method have the following advantages:
1. under the bearing capacity prerequisite of guaranteeing to build the cushion cap jointly, through increasing to 1.8m jointly and build the purpose of stake diameter in order to reach optimization pile foundation quantity, adopt single pile construction scheme after the optimization, avoid building the stake interval closely jointly, cause the problem that the hole scurrying appears in the pore-forming in-process easily, hole collapse, and can reduce labour intensity for the time limit for a project of pile foundation construction, reduced the construction investment.
2. Under the prerequisite of guaranteeing bearing capacity, set up the diameter of co-construction steel-pipe column into 1.5m, be favorable to station room layer building space effect, the co-construction steel-pipe column adopts circular steel-pipe column scheme, and beam column structural system atress system is better, can undertake great load, has reduced the station scale, has practiced thrift the engineering investment.
3. If the large-diameter combined construction steel pipe column adopts a conventional embedded column base, the lower beam or the plate steel bar of the column can be cut off in a large range; meanwhile, the station is of an open cut structure, and if the embedded column base is adopted, the embedded column base is easily disturbed during the concrete pouring of the bottom plate, so that the positioning of the embedded column base is deviated. The invention adopts an end-bearing column base, and vertical steel bars are embedded at the interface position of the column bottom and the bottom plate or the bottom beam so as to improve the connection integrity of the steel pipe column and the bottom plate or the bottom beam.
4. According to different pile lengths and stratums, a proper pile machine is selected, the problems that an individual pile is too long, the requirement on a rotary excavating machine is high, and the cost is high are effectively solved, most of piles are solved by adopting the moderate rotary excavating machine, a punching drilling machine is selected to construct the individual longer pile, the reasonable arrangement is realized, the construction progress and quality are ensured, and the construction cost is saved.
5. The urban rail transit underground subway station and viaduct combined construction engineering design is solved, local land limitation is better solved, land resources are saved, the urban transit function rationalization is enhanced, the investment of construction engineering is reduced, the integrated level of design and construction is improved, the coordination difficulty is reduced, the construction interference is reduced, and the construction quality and safety are guaranteed.
6. The method has the advantages that the co-constructed steel pipe column is manufactured in a processing plant, so that the processing environment and conditions are better than those of field manufacture, and the quality of manufactured finished products is integrally improved; the measures of arranging the lower steel pipe column positioning base plate embedded parts and the temporary connection lug plates to fix the upper and lower two sections of the co-constructed steel pipe columns to be in accurate butt joint are additionally adopted in the co-constructed steel pipe column installation construction, so that the hoisting installation construction errors of the co-constructed steel pipe columns are reduced, and all installation indexes meet the design requirements.
Example two:
as shown in fig. 2, the second embodiment is different from the first embodiment in that: the combined building supporting structures 2 are two groups, the two groups of combined building supporting structures 2 are respectively arranged on the left side and the right side of the middle of the station structure 1, and two combined building piles 21 are arranged in each group of combined building supporting structures 2. Otherwise, the remaining features are the same as those of the first embodiment.
The above-mentioned embodiments are only for convenience of illustration and not intended to limit the invention in any way, and those skilled in the art will be able to make equivalents of the features of the invention without departing from the technical scope of the invention.
Claims (10)
1. The utility model provides a structure is built with overhead bridge jointly in subway station which characterized in that: the station structure comprises a station bottom plate, negative two-layer side walls, a station middle plate, negative one-layer side walls and a station top plate, wherein the negative two-layer side walls are respectively installed on the left side and the right side of the station bottom plate, the station middle plate is installed above the station bottom plate through the negative two-layer side walls on the left side and the right side, the negative one-layer side walls are respectively installed on the left side and the right side of the station middle plate, and the station top plate is installed above the station middle plate through the negative one-layer side walls on the left side and the right side; the combined construction supporting structure comprises a combined construction pile, a combined construction bearing platform and a combined construction steel pipe column, the combined construction pile is installed at the bottom of the combined construction bearing platform, the combined construction bearing platform is installed in a station bottom plate, concrete is poured in the combined construction steel pipe column, the combined construction steel pipe column penetrates through and is connected to a station middle plate and a station top plate, the bottom end of the combined construction steel pipe column is installed on the combined construction bearing platform, and the top end of the combined construction steel pipe column penetrates out of the station top plate to serve as a bridge pier interface for being connected with a bridge pier.
2. The subway station and viaduct combined construction structure as claimed in claim 1, wherein: the combined building supporting structures are provided with one group or two groups, and one or two combined building piles are arranged in each group of combined building supporting structures; when the combined building support structures are in one group, the combined building support structures are arranged in the middle of the station structure; when the combined support structures are two groups, the two groups of combined support structures are respectively arranged on the left side and the right side of the middle part of the station structure.
3. The subway station and viaduct combined construction structure as claimed in claim 1, wherein: the joint-building steel pipe column is provided with a permanent anticorrosive layer and a fireproof layer; the joint-building steel pipe column is formed by connecting two sections, and the connecting point of the two sections of joint-building steel pipe columns is positioned at least 1m above the middle plate of the station; the diameter of the co-constructed steel pipe column is at least 1.5m, the wall thickness is at least 30mm, and concrete C60 is poured in the column; the column base of the co-constructed steel pipe column adopts an end-bearing column base; the joint of the co-constructed steel pipe column and the middle plate beam in the station is connected by adopting shear nails and bracket ring beams; and the joint of the co-constructed steel pipe column and the station roof beam is connected by a bracket ring beam.
4. The subway station and viaduct combined construction structure as claimed in claim 1, wherein: the combined construction pile adopts a cast-in-situ bored pile with the diameter of at least 1.8m and the length of at least 15 m; the combined construction pile is embedded into a continuous and complete micro weathering layer, and the depth of the embedded micro weathering layer is not less than 1 m.
5. The subway station and viaduct combined construction structure as claimed in claim 1, wherein: the combined building bearing platform is located in the station bottom plate, the bottom surface of the combined building bearing platform is lower than the bottom surface of the station bottom plate, and the top surface of the combined building bearing platform is flush with the top surface of the station bottom plate.
6. The subway station and viaduct combined construction structure as claimed in claim 1, wherein: and the joint section of the bridge pier of the joint-built steel pipe column above the station roof is provided with brick laying protection and cement mortar wrapping protection.
7. A construction method of a subway station and viaduct co-building structure as defined in any one of claims 1-6, characterized by comprising the steps of:
step 1), co-construction pile construction: constructing piles with combined pile hole forming more than 50m by using a punching drilling machine, and constructing piles within 50m by using a rotary drilling machine; the length of the combined construction pile is more than 25m, and the combined construction pile is divided into two sections to be welded and connected for assembling and lowering the cage;
step 2) excavating a station foundation pit: according to geological conditions, a long arm excavator and a short arm excavator are matched to directly excavate, and if a rock stratum with high hardness is encountered, a hook excavator is used for breaking and then excavating and transporting;
step 3), concrete pouring of the station bottom plate and the combined building bearing platform: binding reinforcing steel bars on the station bottom plate and the co-building bearing platform, after binding, installing an axillary corner template of the station bottom plate by adopting a steel template, embedding a co-building steel pipe column and a co-building bearing platform node reinforcement cage, an anchor bolt and a positioning pre-embedded cushion steel plate, and then pouring the station bottom plate and the co-building bearing platform concrete;
step 4), hoisting and installing a lower joint building steel pipe column: hoisting is carried out by utilizing a lifting lug at the upper end of the lower joint-building steel pipe column, after the hoisting is in place, the center lines of four sides of the column are aligned and matched with the center line of the foundation paying-off line, and the alignment of the center lines or the deviation control within the range allowed by the specification is taken into consideration, so that the in-place work of the lower joint-building steel pipe column is completed; after the hoisting is finished, performing secondary grouting on the column base in time;
step 5), pouring negative second-layer side wall and station middle plate concrete: the fastener type steel pipe full-space support frame formwork is adopted for pouring the negative second-layer side wall and the station middle plate concrete at one time, so that the number of longitudinal construction joints is reduced, water seepage points of the structure are reduced, and the construction progress is accelerated; after the construction of the negative second-layer side wall of the station and the middle plate of the station is finished, the concrete of the lower joint-building steel pipe column is poured in time, and a concrete construction joint in the column is arranged at a position 500-600 mm below the port of the joint-building steel pipe column;
step 6), hoisting and installing the upper joint building steel pipe column: before hoisting, cleaning the butt joint surfaces of the upper joint-building steel pipe column and the lower joint-building steel pipe column, and ensuring that the butt joint surfaces of the upper joint-building steel pipe column and the lower joint-building steel pipe column are in contact and tightly propped; during hoisting, hoisting is carried out by utilizing the lifting lugs at the upper end of the upper joint building steel pipe column; after the upper joint-building steel pipe column is hoisted in place, the central line of the upper joint-building steel pipe column is matched with the central line of the lower joint-building steel pipe column, and then the upper joint-building steel pipe column and the lower joint-building steel pipe column are connected together through bolts and welding;
step 7), pouring negative layer side wall and station roof concrete: the fastener type steel pipe full-space support frame formwork is adopted for pouring the negative layer of side wall and station top plate concrete at one time, the number of longitudinal construction joints is reduced, the structural water leakage points are reduced, and the construction progress is accelerated; after the construction of the negative layer side wall and the station top plate of the station is finished, the concrete of the upper joint-built steel pipe column is poured in time, the concrete construction joint in the column is arranged at the position 500 mm-600 mm below the joint of the joint-built steel pipe column, and the pier joint section of the joint-built steel pipe column above the station top plate is subjected to brick laying protection and cement mortar wrapping protection.
8. The construction method of the subway station and viaduct co-building structure according to claim 7, characterized in that: in the step 2), in the excavation process, the relationship between excavation and support is processed according to the principles of vertical layering, longitudinal partition segmentation, transverse middle first and rear two sides, support first and rear excavation and rapid bottom sealing, so that the deformation of the foundation pit is always controlled within the qualified index.
9. The construction method of the subway station and viaduct co-building structure according to claim 7, characterized in that: and 4) and 6) or in either one of the steps, during hoisting, the root of the co-constructed steel pipe column is tamped, the root is not lifted off the ground, the co-constructed steel pipe column is straightened step by lifting the lifting hook, amplitude and suspension arm rotation, the co-constructed steel pipe column is lifted continuously after the co-constructed steel pipe column basically stops shaking, the co-constructed steel pipe column is hoisted in place, the lifting hook is not allowed to lift the co-constructed steel pipe column directly in an inclined mode, after the co-constructed steel pipe column is hoisted in place, perpendicularity correction is needed, two theodolites are used for observing the two longitudinal and transverse axes of the co-constructed steel pipe column simultaneously, adjustment is carried out by means of a jack, the column base is fixed after no fault occurs.
10. The construction method of the subway station and viaduct co-building structure according to claim 7, characterized in that: and the co-constructed steel pipe column is processed and manufactured outside a professional steel structure factory, is subjected to permanent anti-corrosion treatment and then is transported to a construction site, and the construction of the co-constructed steel pipe column fire-proof layer is carried out after the main structure of the station is finished.
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| CN202010401983.5A CN111608435A (en) | 2020-05-13 | 2020-05-13 | Subway station and viaduct combined construction structure and construction method thereof |
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| CN202010401983.5A CN111608435A (en) | 2020-05-13 | 2020-05-13 | Subway station and viaduct combined construction structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376426A (en) * | 2020-09-18 | 2021-02-19 | 广东华隧建设集团股份有限公司 | Construction method for jointly building urban pipe gallery and overpass bridge |
| CN114086455A (en) * | 2021-10-22 | 2022-02-25 | 中铁第四勘察设计院集团有限公司 | Overlength structure of railway passenger station |
-
2020
- 2020-05-13 CN CN202010401983.5A patent/CN111608435A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376426A (en) * | 2020-09-18 | 2021-02-19 | 广东华隧建设集团股份有限公司 | Construction method for jointly building urban pipe gallery and overpass bridge |
| CN114086455A (en) * | 2021-10-22 | 2022-02-25 | 中铁第四勘察设计院集团有限公司 | Overlength structure of railway passenger station |
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